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18e80c55bb
We had a check using TARGET_VIRT_ADDR_SPACE_BITS to make sure that the allocation coming in from the command-line option was not too large, but that didn't include target-specific knowledge about other restrictions on user-space. Remove several target-specific hacks in linux-user/main.c. For MIPS and Nios, we can replace them with proper adjustments to the respective target's TARGET_VIRT_ADDR_SPACE_BITS definition. For ARM, we had no existing ifdef but I suspect that the current default value of 0xf7000000 was chosen with this in mind. Define a workable value in linux-user/arm/, and also document why the special case is required. Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20170708025030.15845-3-rth@twiddle.net> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/*
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* ARM specific CPU ABI and functions for linux-user
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ARM_TARGET_CPU_H
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#define ARM_TARGET_CPU_H
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/* We need to be able to map the commpage.
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See validate_guest_space in linux-user/elfload.c. */
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#define MAX_RESERVED_VA 0xffff0000ul
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static inline void cpu_clone_regs(CPUARMState *env, target_ulong newsp)
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{
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if (newsp) {
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env->regs[13] = newsp;
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}
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env->regs[0] = 0;
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}
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static inline void cpu_set_tls(CPUARMState *env, target_ulong newtls)
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{
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if (access_secure_reg(env)) {
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env->cp15.tpidruro_s = newtls;
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} else {
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env->cp15.tpidrro_el[0] = newtls;
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}
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}
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static inline target_ulong cpu_get_tls(CPUARMState *env)
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{
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if (access_secure_reg(env)) {
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return env->cp15.tpidruro_s;
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} else {
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return env->cp15.tpidrro_el[0];
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}
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}
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#endif
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